A photo showing two computers labeled "Fore True Air Speed Computation & For Altitude Correction Time Distance Computer Type D 4" used for flight and navigation instruction at (likely) Hondo AFB during training for WW2.  These were in a group that contained photos from there but there is no indication which base this one was at.  Given the nature of the other photos in this grouping I am saying it is most likely from the Army Air Force Navigation School AAFNS based at Hondo AFB, Texas, during WW2.